Finding the Third Proportional to 11,148 and 21,270

Step by Step Solution

1. Step 1: Write the proportion equation
   11,148 : 21,270 = 21,270 : x
2. Step 2: Convert to fraction form
   11,148/21,270 = 21,270/x
3. Step 3: Cross multiply
   11,148x = 21,270 × 21,270
4. Step 4: Simplify right side
   11,148x = 452,412,900
5. Step 5: Solve for x
   x = 452,412,900/11,148
6. Step 6: Final answer
   x = 40,582.43